1. Angelou, M. (1978) Still I rise. Poetry Foundation. https://www.poetryfoundation.org/poems/46446/still-i-rise
2. Racial selection in deployment to Iraq and Afghanistan;Defense and Peace Economics,2019
3. Baker, P., Toobin, J., & Stillman, S. (2016, November 27). The tragic, forgotten history of black military veterans. The New Yorker. https://www.newyorker.com/news/news-desk/the-tragic-forgotten-history-of-black-military-veterans
4. Brown, D. (2018, February 14). Frederick Douglass needed to see Lincoln. Would the President meet with a former slave? The Washington Post. https://www.washingtonpost.com/news/retropolis/wp/2018/02/14/frederick-douglass-needed-to-see-lincoln-would-the-president-meet-with-a-former-slave
5. Letters of black soldiers from Ohio who served in the 54th and 55th Massachusetts volunteer infantries during the Civil War;Ohio Valley History,2016